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Convertible Notes Payable (Tables) | 9 Months Ended
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Sep. 30, 2020
Debt Disclosure [Abstract] |
Summary of Convertible Notes Payable | A summary of convertible notes payable is as follows (in thousands):
|  | September 30, 2020 |  |  | December 31, 2019 |
March 2020 Notes |  | $ | 10,000 |  |  | $ | — |
December 2019 Notes |  |  | 6,000 |  |  |  | 3,045 |
August 2019 Notes |  |  | 10,000 |  |  |  | 10,000 |
Accrued interest |  |  | 600 |  |  |  | 114 |
Unamortized debt discount |  |  | — |  |  |  | (1,000 | )
|  | $ | 26,600 |  |  | $ | 12,159 |

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